Flicker & Harmonics test ???

[emc-p...@ieee.org]

 
Hi, All
 
When flicker & Harmonics test!
 
EUT's AC input line 3 phase used, but that no have neutral line.
 
Only used R,S,T.
 
- That product flicker & harmonics must test??
 
 If must be test?? 
 
- How can be test ?( impedence? ... )